Bagmaking machine



March 4, 1952 E. T. JAEGER BAG MAKING MACHINE Filed Nov. 15, 1946 INVENTOR 7 BY 2 (f 946%! Q ATTORNEY Patented Mar. 4, 1952 BAGMAKIN G MACHINE Edward T. Jaeger, Rockville Centre, N. Y., as-

signor to Manhasset Machine Company, Min-- eola, N. Y., a partnership consisting of Charles M. Jaegerand Edward T. Jaeger Application November 15, 1946, Serial'No. 710,209

4 Claims.

This invention relates to striking or cut-off mechanisms, and especially to striking or cut-off mechanisms employed in bag making machines.

In such machines, a sheet, web or tube of bag making material is fed continuously through a pair of rollers which serve to advance the material between a pair of cam-shaped rollers having high or operative segments and low or 'incam-shaped rollers engage the material, its speed of travel is slowed and a crimp or loop is formed therein between the two sets of rollers. As the crimp is formed in the material, a striker blade travels edgewise across the path traveled by the material between the two sets of rollers where the crimp is formed and so severs the material into bag lengths. Thereafter, inoperative segments of the cam-shaped or crimping rollers are brought opposite one another, at which time an additional pair of rollers act to advance the cut-off portion of the material to forming and glueing mechanisms.

Since the speed at which the material travels through such machines is high, being in the neighborhood of 1000 feet per minute, it is-common practice to mount a plurality of blades on a common carrier which is adapted and arranged to swing one of the blades across the path traveled by the material between the two sets of rollers each time a crimp or loop is formed in the material. To preventtearing of the material, however, during the cut-off operation, it is essential that the blades be so mounted that they strike against the crimped portion of the material at a critical angle of inclination. In consequence, any changes in the operation of the machine which required a re-setting of the blades has heretofore entailed a considerable loss of time in the operation of the machine, since as heretofore constructed, each of the blades had to be adjusted separately.

In accordance with the present invention, the above noted as well as other objects are obviated by providing means for simultaneously adjusting all the blades to the proper angle of inclination.

To these ends, means are provided whereby an adjustment of one of the blades simultaneously eifects .a like adjustment of the remainder of the blades. In accordance with the present embodiment of the invention, this arrangement includes a drive shaft having a gear loosely mounted thereon between a pair of face plates which are so mounted on the shaft as to rotate in unison therewith. The striker blades are clamped at their inner ends between the face plates and are spaced equal distances apart so that each one projects from between the face plates at substantially the same angle. At their inner ends, the blades are provided with gear segments in mesh with the gear on the drive shaft, and they are pivotally mounted to the face plates, the arrangement of parts being such that when the face plates are loosened and one of the blades is swung about its pivotal axis so as to change the angle at which it projects from between the face plates, a like change is simultaneously brought about in the remainder of the blades.

For a more detailed description of the invention, reference may bemade to the accompanying drawing, wherein the invention is shownmerely by way of example and in preferred form. Obviously, however, many variations and modifications may be made therein which will still be comprised within its spirit, and it is to be understood that the invention is not to be limited to any specific form or embodiment except insofar as such limitations are specified in the appended claims.

Referring to the drawings:

Fig. 1 is a plan view of that portion of a bag making machine having to do with cutting a continuously traveling sheet, web, tube, etc. of material into desired lengths;

Fig. 2 is a side view of the same assembly taken along line 2-2 of Fig. 1; and

Fig. 3 is a section on line 33 of Fig. 2.

As shown in these drawings, a flat tube I0 of bag making material after being formed about a fiat former plate l2 travels between a pair of oppositely disposed power driven rollers l4, l8 journaled in side frames I8, 20 of the machine. The rollers I 4, l6 serve to draw the tube It along the former plate l2 and to advance it beneath a cut-off plate or knife 22 carried by a bracket '25 secured to the main frame of the machine, and thence between a pair of power driven oppositely disposed crimping rollers 24, 26 which are also journaled in the side frames 18, 20 .of the machine. The crimping rollers 24, 26 are cam-shaped, that is to say, they are provided with high or operative segments 28 and with low or inoperative segments 30. The high or operative segments 28 are adapted and arranged to frictionally engage the tube H! as it travels therebetween, whereas the low or inoperative segments 30 are .so recessed or cut away that when they are opposite one another they permit the tube ill to travel freely 'th'erebietween. The surface speed of the crimping rollers 24, .26, however. :is slowerthan the-surface speed of the .feed

rollers l4, l6 with the result that as the tube I is frictionally engaged by the high segments 28 of the crimping rollers 24, 26 as it travels therebetween, its speed of travel is reduced, and a crimp 32 is formed between the two sets of rollers. As this crimp 32 is formed in the tube I0, a striker blade 38 which is actuated by a power driven shaft 46 in the manner subsequently to be described, swings upwardly between the two sets of rollers and so severs the tube Hlwhere the crimp has been formed therein, the former plate l2 serving to hold the lowermost sheet of the tube In and the cut-off plate 22 serving to hold the uppermost sheet of the tube It) during this cut-off operation.

The spacing of the high and low segments 28, 30 on the crimping rollers 24, 26 is such with relation to the surface speed at which these rollers turn that as soon as the tube 18 has been severed the low or inoperative segments 30 are brought opposite one another so as to permit additional rollers beyond (not shown) to act to advance the cut-off portion of the tube I0 to forming and glueing mechanisms (not shown).

The sequence of operations is such that each time a crimp or fold 32 is formed in the tube II] by the crimping rollers 24, 26, one of a number of blades 38 swings across the path traveled by the tube [8 between the two sets of rollers to sever the tube 18 into bag lengths.

As stated heretofore, to prevent tearing of the tube It during this cut-off operation it is essential that the blades 38 strike against the crimped portion of the tube I0 at a critical angle. In consequence, in the event it is desired to change the speed of travel of the tube [8 through the machine, a change must be made in the angle at which each of the striker blades 38 project from their common carrier.

Coming now to the present invention, means are .provided for so mounting the blades 38 that when an adjustment is made in the position of one blade a like adjustment will be effected simultaneously in the position of the remainder of the blades. To these ends, a drive shaft 40 is journaled in bearings 42, 44 carried by the main fram of the machine. The drive shaft 48 is adapted and arranged to be driven by a suitable source of power (not shown). A gear 46 is rotatably mounted on the shaft 46. A pair of face plates 48, 58 are splined to the shaft 40 and are normally held against lateral movement by means of collars 52, 54 mounted on the shaft 40. In the present embodiment of the invention, four striker blades 38 are clamped between the face plates 48, 58. It is to be understood, however, that a greater or less number of striker blades 38 may be employed. At their inner ends, the blades 38 are provided with gear segments 56 which mesh with the gear 48 on the drive shaft 40. Also at their inner ends, the blades 38 are pivotally mounted on studs 58 carried by the face plates 48, 58. The blades 38 are spaced equal distances apart so that they project from between the face plates 48, 50 at substantially the same angle. The clamping of the blades 38 between the face .plates 48, 58 is effected by means of studs 60 which pass therethrough from one face plate 48 to the other face plate 50. The holes 62 in the face plates 48, 50 through which the clamping studs 60 pass, however, are arc-shaped so that when the clamping studs 30 are loosened or backed off, the blades 38 may be moved in either direction about their pivotal axis. however, as each of the blades 38 is geared at Inasmuch,

its inner end to the common gear 46 on the drive shaft 40 a movement of one of the blades 38 about its pivotal axis to change the angle at which it projects from between the face plates 48, 50 simultaneously effects a like change in the angle at which the remainder of the blades 38 project from between the face plates 48, 50 as is shown in Fig. 3 wherein the blades 38 have been moved from the position shown in full lines to either of the positions shown by dotted lines. In consequence, where it is desired to change the angle at which the [blades 38 strike against the crimped portion 32 of the tube l0 during the cut-off opera.- tions, it is only necessary to back off the clamping studs 60, then rotate one of the blades 38 about its pivotal axis until the desired angle has been attained, and then retighten the clamping studs 66.

While the present invention has been described in connection with the severence of a tube into bag lengths it is to be understood, as stated heretofore, that this has been done merely for purposes of illustration and that in the event a web or sheet of bag making material is employed equally favorable results may be attained.

Having thus described my invention, I claim:

1. A striker or cut-off mechanism comprising a drive shaft, a pair of face plates mounted on said shaft and driven thereby, a plurality of striker blades carried by said face plates and extending outwardly therefrom, and means for simultaneously adjusting the angle at which said blades extend outwardly from between said face plates.

2. A striker or cut-oil" mechanism comprising a drive shaft, a rotatable element mounted on said shaft, a plurality of striker blades so connected at their inner ends to said element that themovement of one at its outer end simultaneously effects a substantially like movement of the remainder of the blades, and means for clamping said blades in fixed position.

3. A striker or cut-01f mechanism comprising a drive shaft, a gear rotatably mounted on said shaft, a plurality of pivotally mounted striker blades having gear segments at their inner ends in mesh with said gear, and means for clam-ping said blades in fixed position with respect to said shaft.

4. In or for a bag making machine, the combination of means for continuously advancing a tube, web or sheet of bag making material through said machine, a plurality of striker blades, means for passing said blades across the path of travel of said material, and means for simultaneously so adjusting all of said blades as to ensure they pass the path of travel of said material at substantially the same angle.

1,; EDWARD T. JAEGER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date 1,140,208 Taylor May 18, 1915 1,519,882 Stewart et a1. Dec. 16, 1924 1,844,660 Kastel Feb. 9, 1932 FOREIGN PATENTS Number Country Date Germany Aug. 22, 1925 

